From the FAQ at
www.phpbb.comHow do I use the avatar settings?
There are three types of avatar; upload, remote and local.
* Upload types require you to create a directory (the default is images/avatars) and to set this to public read/write (ie. chmod a+rw), users can then upload avatars (subject to width, height and size limits definable by you).
* Remote avatars allow the user to supply a URI pointing to an image available on the internet, PLEASE NOTE that size limits do not apply to remote avatars!
* Local avatars allow you to upload your own avatars to a set directory, users can then pick from this avatar gallery. The default location for this is images/avatars/gallery. PLEASE NOTE that avatars are categorised according to sub-folders in this location! ie. you MUST place your avatars in subdirectories, eg. images/avatars/gallery/cartoons, images/avatars/gallery/real-life, etc.
You can also get several groups of avatars from
PhpBB